Sony Bravia XBR-55X900C, Service Manual

Page: 143 / 208

XBR-55/65X900C, 905C, 907C
143
TROUBLE SHOOTING
3-5-1. No Picture AEP Destination (BMFL/BMFW) SCART
No Picture AEP
SCART CVBS
No Picture
Check wave between
C7511 and IC1000
Detailed check all parts at
CN7501 along signal path
at Pin No:
20 : [D7505/R7518/C7510/
R7599/R7519]
Check SCART_FB
IC1000 L37
[SOY0] at R7514
* Check CN7501
Connection
Muffin [IC1000]
Problem
SCART RGB
No Picture
OK (Vpp: 1 V)
Check wave between
C7502/C7505/C7507
and IC1000
** Detailed check all parts at
CN7501 along signal path
at Pin No:
7 : [VD7503/R7503/C7501/
R7504]
11 : [VD7502/R7506/C7503/
R7507]
15 : [VD7501/R7510/C7506/
R7511]
NG (Vpp: 0 V)
Check SCART_FB
IC1000 L37
[SOY0] at R7514
* Check CN7501
Connection
NG
[LOW: 0V]
OK [HIGH: 0.4V

Composite]
OK [HIGH: 3V

RGB]
Muffin [IC1000]
Problem
** Detailed check all parts
at SCART_FB signal
Path [VD7504/R7513]
CN7501 Connectivity
Problem
Parts Broken
CN7501 Connector
Problem
OK
NG
CN7501 Connectivity
Problem
NG
OK
NG
NG
** Detailed check all parts
at SCART_FB signal
Path [VD7504/R7513]
Parts Broken
CN7501 Connector
Problem
OK
OK
OK
NG
NG
OK
**

OK Condition : No part short-circuited

NG Condition : Part short-circuited
NG (Vpp: 0 V)
OK (Vpp: 1 V)
*

OK Condition : No solder splash can be seen

NG Condition : Solder splash can be seen
[All voltage measurement using Oscilloscope]
NG
[LOW: 0V]
OK [HIGH: 0.4V

Composite]
OK [HIGH: 3V

RGB]